Situ, Rong, Hibiki, Takashi, Ishii, Mamoru, Mori, Michitsugu, Tu, Jiyuan, Yeoh, Guan Heng, and Park, Goon Cherl (2006) Bubble lift-off in forced convective subcooled boiling flow. In: Proceedings of 13th International Heat Transfer Conference . BIO-021. From: The 13th International Heat Transfer Conference , 13-18 August 2006, Sydney, Australia.

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Abstract

Bubble lift-off is different from bubble departure, and it is more suitable for the boundary condition for numerical simulation of subcooled boiling flow. A force balance analysis of a growing bubble was performed to predict the bubble lift-off size. The dimensionless form of the bubble lift-off diameter was formulated to be a function of Jacob number and Prandtl number. The modeling of bubble lift-off frequency requires careful study of bubble collapse during sliding. Forced convective subcooled boiling flow experiments were conducted in a BWR-scaled vertical upward annular channel. Water was used as the testing fluid, and the tests were performed at atmospheric pressure. A high-speed digital video camera was applied to capture the dynamics of the bubble nucleation process. Bubble lift-off diameters and lift-off frequencies were obtained from the images for a total of 92 test conditions. The bubble lift-off frequency was found to be same as the bubble departure frequency. The proposed bubble lift-off diameter model agreed well with the experimental data within the averaged relative deviation of ±33.6 %.

Item ID:	21538
Item Type:	Conference Item (Research - E1)
ISBN:	1-56700-226-9
Date Deposited:	20 Aug 2012 04:59
FoR Codes:	09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50% 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 50%
SEO Codes:	85 ENERGY > 8504 Energy Transformation > 850403 Nuclear Energy @ 50% 85 ENERGY > 8507 Energy Conservation and Efficiency > 850701 Commercial Energy Conservation and Efficiency @ 50%
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